IBM Journal of Research and Development - Papers on mustimedia systems
An adaptive and fast fractional pixel search algorithm in H.264
Signal Processing
Chaotic time series forecasting using locally quadratic fuzzy neural models
FS'08 Proceedings of the 9th WSEAS International Conference on Fuzzy Systems
PCS'09 Proceedings of the 27th conference on Picture Coding Symposium
An efficient half pixel motion estimation algorithm based on spatial correlations
CIS'04 Proceedings of the First international conference on Computational and Information Science
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Accurate motion estimation is essential to effective motion compensated video signal processing, and subpixel resolutions are required for high quality applications. It is observed that around the optimum point of the motion estimation process the error criterion function is well modeled as a quadratic function with respect to the motion vector offsets. This locally quadratic functional model decomposes the motion estimation optimization at subpixel resolutions into a two-stage pipelinable processes: full-search at full-pixel resolution and interpolation at any subpixel resolution. Practical approximation formulas lead to the explicit computations of both motion vectors and error criterion functional values at subpixel resolutions